Elephants are herbivores and eat about 5 percent of their body weight. They engage nearly 16-18 hours a day in eating, however only 40 percent of the ingested food gets digested. The diet of elephants is highly diverse, and includes types of plants and their parts. They prefer feeding on grasses, leaves, soft barks and fruits. On an average, elephants drink about 30-50 gallons of water.